12 Things to Check Before Ordering a Hot-Melt Gluing / Coating Machine

Ordering a hot-melt gluing or coating machine is usually a non-standard purchase. A machine that looks right on paper can still fail on your glue, your substrate, your box size, or your line speed. Use this checklist before you order — for example, when considering a machine from the Zhishang S088 series. Send the 12 questions to the supplier, ask for written confirmation on each item, and keep the answers with your order.

1. Glue type and viscosity range

Confirm which adhesives the machine is built for — hot-melt, cold glue, or others — and the viscosity range it handles. A machine tuned for one glue may string, drip, or starve on another. Ask: which glue types and viscosity range is this model rated for? Has it run your exact glue? Can the supplier test your glue sample before you order?

2. Dispensing / coating method and width

Confirm the application method matches your pattern: bead, dot, spray, slot-die coating, roller coating, or inner-wall gluing inside a box. Confirm the working width covers your largest product. Ask for the minimum and maximum width, and whether width adjustment is tool-free or needs change parts.

3. Output speed and cycle time

Confirm the rated speed in your own units — pieces per hour or metres per minute — and under what conditions. Ask whether the quoted speed is for continuous running on your product, or a no-load maximum. If your line does not stop, ask how the machine tracks the line speed and applies glue on the move.

4. Substrate and product size

Confirm the machine handles your substrate — cardboard, coated paper, plastic, wood, or others — and your full size range: minimum and maximum length, width, height, and weight. If you run several box sizes, ask how changeover works and how long it takes.

5. Pump and valve selection

The pump and valve decide flow stability — gear pump, piston pump, screw pump, and different valve types behave differently, especially with filled or abrasive glues. Ask which pump and valve the quoted model uses, whether they suit your glue, and how wear parts are replaced.

6. Heating and temperature control

For hot-melt, ask about heating zones, temperature control accuracy, heat-up time, and protection against charring or degradation when the machine idles. Ask whether temperature is controlled per zone, and what happens on over-temperature.

7. Voltage customization

Confirm whether the machine can be built for your local voltage and frequency, and whether the quote already includes it. Do not assume the standard voltage matches your plant — get it in writing.

8. Lead time

Ask for the lead time in writing: production time, testing time before shipment, shipping time, and what counts as day one — order confirmation or deposit payment. Ask what happens if delivery slips.

9. Minimum order quantity

Confirm the minimum order quantity — for machines, and also for spare parts, nozzles, and wear parts. Some suppliers price one machine but require batches for wear parts. Confirm before you budget.

10. Warranty and after-sales service

Ask what the warranty covers and for how long, what counts as wear parts and is therefore excluded, the response time when something fails, spare parts availability, and whether remote support or video guidance is offered.

11. Custom (non-standard) machine process

If your product needs a non-standard machine, confirm the customization process in writing: requirement review, design confirmation, sample testing, acceptance criteria, and who signs off each step. Do not start production on a verbal promise alone.

12. Acceptance criteria

Agree the acceptance criteria before you pay the balance: which samples to run, what a pass looks like — bead quality, no stringing or dripping, speed, repeatability — who witnesses it, on-site or by video, and what happens if it fails.

How to use this checklist

Copy the 12 questions and send them to your supplier. If a supplier cannot answer an item in writing, treat that as a risk signal, not a detail to sort out later. Keep the written answers with your order — they are your evidence if the machine does not perform as quoted.

If you are still choosing a machine, start with the model finder quiz or browse the guides.

Related guides

• Why does hot melt glue string, and how do I stop it?
• Why Hot Melt Glue Won't Stick to Your Box Wrap
• Hot Melt Nozzle Clogging, Charring and Smoking

Last updated: 2026-10-27